Index: tools/rockboxdev.sh
===================================================================
--- tools/rockboxdev.sh	(revision 20888)
+++ tools/rockboxdev.sh	(working copy)
@@ -10,11 +10,18 @@
 # downloaded files
 dlwhere="${RBDEV_DOWNLOAD:-/tmp/rbdev-dl}"
 
-# will append the target string to the prefix dir mentioned here
+# This is the prefix for cross compilers used to build rockbox.
+# We will append the target string to the prefix dir mentioned here.
+# The default prefix is used if the custom prefix is not set or is empty.
 # Note that the user running this script must be able to do make install in
 # this given prefix directory. Also make sure that this given root dir
 # exists.
-prefix="${RBDEV_PREFIX:-/usr/local}"
+if [ -f ~/.config/rockbox.org/RockboxCompilerPrefix ]; then
+  read prefix < ~/.config/rockbox.org/RockboxCompilerPrefix
+fi
+if [ -z "$prefix" ]; then
+  prefix="${RBDEV_PREFIX:-/usr/local}"
+fi
 
 # This directory is used to extract all files and to build everything in. It
 # must not exist before this script is invoked (as a security measure).
Index: tools/configure
===================================================================
--- tools/configure	(revision 20888)
+++ tools/configure	(working copy)
@@ -38,11 +38,24 @@
  OC=${prefix}objcopy
 }
 
+setpath () {
+ # This is the prefix for cross compilers used to build rockbox.
+ # It won't be set if the custom prefix is not set or is empty.
+ if [ -f ~/.config/rockbox.org/RockboxCompilerPrefix ]; then
+   read path_prefix < ~/.config/rockbox.org/RockboxCompilerPrefix
+ fi
+ if [ -n "$path_prefix" ]; then
+   path_prepend="$path_prefix/$1/bin:"
+   PATH="$path_prepend$PATH"
+ fi
+}
+
 crosswincc () {
  # naive approach to selecting a mingw cross-compiler on linux/*nix
  echo "Enabling win32 crosscompiling"
 
  prefixtools i586-mingw32msvc-
+ setpath i586-mingw32msvc
 
  # add cross-compiler option(s)
  GCCOPTS="$GCCOPTS `sdl-config --cflags`"
@@ -224,6 +237,7 @@
 #
 shcc () {
  prefixtools sh-elf-
+ setpath sh-elf
  GCCOPTS="$CCOPTS -m1"
  GCCOPTIMIZE="-fomit-frame-pointer -fschedule-insns"
  endian="big"
@@ -232,6 +246,7 @@
 
 calmrisccc () {
  prefixtools calmrisc16-unknown-elf-
+ setpath calmrisc16-unknown-elf
  GCCOPTS="-Wl\,--no-check-sections $CCOPTS"
  GCCOPTIMIZE="-fomit-frame-pointer"
  endian="big"
@@ -239,6 +254,7 @@
 
 coldfirecc () {
  prefixtools m68k-elf-
+ setpath m68k-elf
  GCCOPTS="$CCOPTS -m5206e -Wa\,-m5249 -malign-int -mstrict-align"
  GCCOPTIMIZE="-fomit-frame-pointer"
  endian="big"
@@ -247,6 +263,7 @@
 
 arm7tdmicc () {
  prefixtools arm-elf-
+ setpath arm-elf
  GCCOPTS="$CCOPTS -mcpu=arm7tdmi"
  if test "X$1" != "Xshort"; then
    GCCOPTS="$GCCOPTS -mlong-calls"
@@ -258,6 +275,7 @@
 
 arm9tdmicc () {
  prefixtools arm-elf-
+ setpath arm-elf
  GCCOPTS="$CCOPTS -mcpu=arm9tdmi"
  if test "$modelname" != "gigabeatf"; then
   GCCOPTS="$GCCOPTS -mlong-calls"
@@ -269,6 +287,7 @@
 
 arm940tbecc () {
  prefixtools arm-elf-
+ setpath arm-elf
  GCCOPTS="$CCOPTS -mbig-endian -mcpu=arm940t -mlong-calls"
  GCCOPTIMIZE="-fomit-frame-pointer"
  endian="big"
@@ -277,6 +296,7 @@
 
 arm946cc () {
  prefixtools arm-elf-
+ setpath arm-elf
  GCCOPTS="$CCOPTS -mcpu=arm9e -mlong-calls"
  GCCOPTIMIZE="-fomit-frame-pointer"
  endian="little"
@@ -285,6 +305,7 @@
 
 arm926ejscc () {
  prefixtools arm-elf-
+ setpath arm-elf
  GCCOPTS="$CCOPTS -mcpu=arm926ej-s -mlong-calls"
  GCCOPTIMIZE="-fomit-frame-pointer"
  endian="little"
@@ -293,6 +314,7 @@
 
 arm1136jfscc () {
  prefixtools arm-elf-
+ setpath arm-elf
  GCCOPTS="$CCOPTS -mcpu=arm1136jf-s"
  if test "$modelname" != "gigabeats"; then
   GCCOPTS="$GCCOPTS -mlong-calls"
@@ -304,6 +326,7 @@
 
 mipselcc () {
  prefixtools mipsel-elf-
+ setpath mipsel-elf
  GCCOPTS="$CCOPTS -march=mips32 -mtune=r4600 -mno-mips16 -mno-abicalls -mno-long-calls -Wno-parentheses"
  GCCOPTIMIZE="-fomit-frame-pointer"
  GCCOPTS="$GCCOPTS -fno-pic -fno-builtin -fno-exceptions -ffunction-sections -msoft-float -G 0"
@@ -2467,6 +2490,7 @@
 ### end of cmdline
 
 sed > Makefile \
+ -e "s,@PATH_PREPEND@,${path_prepend},g" \
  -e "s,@ROOTDIR@,${rootdir},g" \
  -e "s,@DEBUG@,${debug},g" \
  -e "s,@MEMORY@,${memory},g" \
@@ -2533,6 +2557,7 @@
 <<EOF
 ## Automatically generated. http://www.rockbox.org/
 
+export PATH:=@PATH_PREPEND@\${PATH}
 export ROOTDIR=@ROOTDIR@
 export FIRMDIR=@FIRMDIR@
 export APPSDIR=@APPSDIR@